Adjustable screen for grain or seeds.



Patented sept. lo, 19m. HEINTZ.

M. SCHILL L J. A.. ADJUSTABLE SCREEN FOR GRAIN 0R SEEDS.

(Application filed Mar. 19, 1900.)

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No. 682,28I. Patented Sept. I0, |90I.

M. SCHILL & J. A. HEINTZ. ADJUSTABLE SCREEN FDR GRAIN 0R SEEDS.

(Application med Mar. 19, 1900. (No Model.)

2 Sheets-Sheet 2.

masses? @.ym/( L y Tun MATHIAS SOHILL, OF FARMHILL, AND JOHN A.I-IEINTZ, OF MENOMONIE,

i WISCONSIN.

ADJUSTABLE SCREEN FOR GRAIN OR SEEDS.

SPECIFICATION forming part of Letters Patent No. 682,281, datedSeptember 10, 1901. Application filed March 19,1900. Serial No. 91176-(No model.)

To @ZZ whom it may concern:

Be it known that we, MArHrAs SOHILL, residing at Farmhill, in the countyof Pierce, and JOHN A. IIEINTZ, residing at Menomonie, inthe county ofDunn, State of Wisconsin, citizens of the United States, have inventedcertain new and useful Improvements in Adjustable Screens for Grain orSeeds, of which the following is a specification.

Our invention relates to improvements in adjustable screens for grainand seeds, and has for its object to provide a screen which may be usedfor different kinds of grain and in which the holes or apertures may beeasily varied in size, according to the kind of grain or seeds to bescreened.

To this end our invention consists in the construction,combination, andarrangements of parts hereinafter described, and specifically pointedout in the claims.

In the accompanying drawings, forming part of this specification, Figurel is a plan view of our improved screen adjusted for4 apertures of thelargest size. Fig. 2 is an end elevation thereof. Fig. 3 is a verticalsection taken on line @c3 nog of Fig. 1 with the cleats removed. Fig. 4is a detail in elevation, partly broken away, to show the guides for theunder or sliding plate. Fig. 5 is a detail of the screen in plan whenadjusted for apertures of the largest size. Fig. 6 is a vertical sectionon line :o6 m6 of Fig. 5. Fig. f? is a detail of the screen in plan whenadjusted for apertures of the smallest size, and Fig. 8 is a verticalsection on line w8 x8 of Fig. 7.

In the drawings, 2 represents the framework, to which the upper orstationary screen plate or sheet 3 is secured by bolts or screws and byside cleats 4 and the central cleat 5. This plate is formed with aseries of apertures, each consisting of a transverse slot 6, having acentral forwardly-extending cutaway portion 11. A pair of lips 7 projectupwardly and forwardly from the ends of the rear side of the slot 6.

Slidably arranged upon the under side of the frame is a bar 8, upon theupper side of which is secured the lower screen-plate 9, with its uppersurface contacting with the lower surface of the upper screen-plate. The

lower screen-plate is formed with a series of apertures, consisting eachof two longitudinally-extending slots 10, as shown by dotted lines inFigs. 1, 5, and 7. The forward end of the material separatingthe slots10 is upturned to form a lip l1, which projects upwardly and forwardlybetween the lips upon the upper plate. The space 12, caused by theupturuing of the lip ll, connects the forward ends of the slots 10, asindicated in Fig. 5. The portions 25 of the under plate between each rowof apertures are formed with small holes 13 for screening millet andsmall seeds. The lower screen-plate 9 is also provided with a series ofnarrow longitudinally-extending slots 14, which allow it to slide uponthe pivots 15, by which it is attached to the upper screen-plate. Theside edges of the upper screen-plate are turned under at intervals, asshown in Fig. 4, to serve as guides 16, in which the lower plate isadapted to slide.

I-Iaving fulcrum support on the frame at 17 is a transversely-eXtendinglever 18, pivotally secured to the sliding bar 8 at 19. To the end 20 ofthis lever is pivoted a handlebar 2l, extending out beyond the frame andheld normally pressed up against it by means of the spring 22. ,Thishandle-bar is provided with a series of notches 23, adapted to engage aplate 24 upon the frame and be held thereby in locked position.

Figs. 1 and 2 show the arrangement of the l apertures and lips when thesliding screenplate is forced back to its innermost position. In thisposition the upwardly-turned lips 12 of the lower plate stand inalinement with the lips 7 of the upper plate, leaving below them Wideregistering openings through both plates, the forwardly-extendingportion of the slot 6 being closed by the portions 25 of the underscreen. When so adjusted, the screen is adapted for use in screeningwheat and coarser grains. When the sliding plate 9 is pulled out halfthe distance of its travel, the lips 12 of this plate are drawn forwardin advance of the lips 7 of the upper plate, the tongues 11 closing therear portion of the slot 6, while at the same time the portion 25 of theunder screen is drawn out from beneath the slot 6, leaving the forwardpart of this IOO pulled out'the whole vdistance of its travel,

as shown in Figs. 7 and 8, the tongues 1l and the portions 25 oftheunder plate between the rows of apertures will almost close the openingsin the upper plate, leaving no apertures for the passage of grain orseeds except the small slots 13 andthe narrow spaces between the edgesof the apertures in the upper and lower screens. y

lHaving now described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

1. In a screen of the class described, the combination, with the frame,of two screenplates supported thereby and arranged one above the other,the plates being formed with registering apertures, lips projectingupwardly from one side of each of the apertures in the upper plate, lipsarranged along the corresponding side of each of the apertures in thelower plate and projecting upwardly between the lips upon the upperplate, and means for adjusting said plates to carry the lips upon oneplate out of alinement with the lips upon the other plate.

2. In a screen of the class described, the combination with a frame, oftwo plates slidably arranged one above the other, the upper plate beingformed with apertures each consisting of a transverse slot having acentral forward extension, and the lower plate being formed withapertures registering with the apertures in the upper plate, lipsprojecting upwardly from the ends of the rear side of the transverseslots in the upper plate, and lips projecting upwardly from the lowerplate between the lips upon the upper plate, the lips upon the lowerplate being of less width than the forwardly-extending part of theapertures in the upper plate.l

In testimony whereof we aflix our signatures in presence of twowitnesses.

MATHIAS SCI-ULL.

JOHN A. HEINTZ. lVitnesses:

LoUIs WAGNER, E. J. BATES.

